Carbureter.



N. & K. SMITH.

. CARBURBTER.

APPLICATION FILED 0021.14, 1912. 1,1 01,345. Patente@ une 23, A A z SHEBTS-SHBET 1.

i. 7/ oy gy N. 6r K. SMITH.

CARBURETER. APPLICATION FILED 0011.14, 1912.

1,101,345, 1 Patented June 23,1914.

2 SHEETS-SHEET 2.

NEVILLE SMTTHAND KENNETH SMITH, or LoNDoN, ENGLAND.

. CABBURETEB.

Specification of Letters Patent.

Application filed October 14, 19172. Serial No. 725,669.

Patented June 23, 1914.

To all whom it may concern: I

Be it known that we, NEYILLE SMITH, a subject of the Kino' of Great Britain, residing at 26 Bedford TilowrLondon,y 1V. C., England, and KENNETH-SMITH, a subject of thc King of Great Britain, residing at 186 Lancaster road, Notting Hill, London, W., England, have invented new and useful Improvements in Carbureters, of which the following is a specification.

This invention relates to. carbureters for the production of a mixture of petrol vapor and air for lighting audheating purposes.

It is the object of the invention to provide a carburcter in which the vaporizing `surfaces are in contact with water or anti-freez ing liquid which maintains them at auniform temperature andprevents suchexccssive cooling as wouldinterfcre with continued vaporizing; whi'chshall be simple in form and construction and which shall perniit the [low of petrol over a continuous vapurr/.ing surface so that after its first distribution it'is at no time resolved into drops.v

To this end the invention designs to employ as a vaporizing surface a simple flat metal plate bent into 4suitably curved zigzags, so that petrol may be caused to flow in a thin continuous sheet over one side of it, adhering throughout to the surface and nowhere dropping from it.

lt is a further object of the invention to provide a carburetor of this class in which the liquid petrol is caused to flow more slowly as it approaches the outlet, and Ais brought into closer contact with theair, so

that the reduction in the rate of vaporization due to cooling of the liquid and partial saturation of the air, may be compensated by the slower travel of the petrol and its closer contact with the air. The invent-ion further designs to provide in such a carbureter for the circulation of the anti-freezing liquid, so as more perfectly to maintain the desired uniformity of temperature, and .for this purpose the most developed construction of carbureter accord-v ing to the invention includes a stirring device iminersed in the antiefreezing liquid.

Constructions according to the invention are illustrated in the accompanying drawings, Figure 1 showing one form in' vertical section'. Fig. 2 a plan of that form with the cover partially broken away. Fig. 3 a view similar to Fig. 2 of a modification.

. Fig.; 4 a vertical section of the top portion of the modification shown in Fig. 3' and Fig. 5 is a vertical section of a further modification.

The vaporizing surface is constructedl in ,a very simple and cheap forni by'bending a flat plate or .strip of metal Iintoa series of zigzags. I One set of bends 3 of the zigzags are made comparatively gradual. The Zigzag's are unequal, the upper ones being much steeper than the lower,v as may be' seen from the drawing. The plate thus bent is secured within a suitable watertight container 2 which is filled with anti-freez-l ing liquid 10 Such as glycerin. This li uid contacts with the plate 1 upon one side, ut is shut off from the other side of the plate by a partition 1l. The space thus inclosed between the partition 1 1 and the vaporizing surface 1 isv` shut in at the top by a suitable-cover 1S. At the top and bottom of this space provision is made at 13 and 1l for inspection caps. Air is admitted to the vaporizing space through a pipe 7 and hydrocarbon through Ya pipe 4. This latter conducts the liquid to a distributing device consisting, for instauccfof a wedge-shaped channel 5 of wire gauze Fig. 2 lying transversely across theV extremev upper end of the vaporizing surface 1. This channel and the surface of the plate 1 adjacent to it are protected from the incoming air by a plate 8 secured to the cover 18 and extending down into close contact with the plate 1. This prevents too rapid vaporization of the petrol upon its lrhmediate entry into the apparatusand perinits of its being distributed into a flat sheet before its surface is disturbed by the air.

In order that the air may be thereafter kept in comparatively close contact with the petrol there are provided between successive' bends of the plate 1 battle plates 9 attached to the partition 11 and so arranged as to cause air to How substantially along the surface of the plate 1 in company with the petrol. The mixed air and'petrol is taken from the apparatus at the bottom through a pipe 12.

The gradual curves 8 which constitute the convex, bends in the vaporizing surface are such as to permit the petrol to adhere to the surface instead of dropping therefrom. Thus when the apparatus is xin operation the whole of the plate 1 becomes covered on one side with a continuous sheet of petrol diminishing to vanishing thickness at the 'that the rate of flow of petro bottomand thus all the vaporization takes place from a surface which is in Contact with the anti-freezing liquid 10. In place of the trough distributer 5 there may be secured upon the u per vend .ofthe plate 1 an Aupstanding slightly bent baffle 6 of Wire gauze as indicated in Figs. 3 and 4. The pipe 4 then delivers directly on to the plate 1 and the baiile 6 insures the distribution of the petrol transversely over the plate. The

aiile 6 slopes in both directions slightly down the slope of the top plate 1 so that petrol Will run from the center outward in Acontact with the batile 6 and the petrol will partly pass through the perforations therein all along its length.

In the alternative construction shown in Fig. 5 the plate 1 is curved throughout its length instead of being made up of fiat sec,

tions with comparativelyy sharp intermediate bends. .Aconvex vaporizing surface is formed by"approximately elliptical bends L15, Whichhowever diminish in their minor axis toward the bottom of the a paratus so i) decreases. This modification also illustrates the application of a stirring device to promote circulation of the anti-freezing liquid 10. This consists of suitable blades 16 secured upon a shaft 17 which may be rotated by connection Awith any suitable portion of the carbureting apparatus, forinstance with the pump (not shown) by which airl issuppled.A

The 'rotation of the blade 16 brings the cold liquid, which is liable to accumulate at the bottom of the casing up toward the surface "and so tends to maintain the Whole .of the liquid. and consequently the -whole of the surface 1 at a uniform temperature.

What We claim isf 1. In a carbureter the 'combination of a y* fiat plate'bent into a zigzag, so as to present a number of surfaces of successively decreasing gradient toward the bottom of said zigzag, one side of said plate having convex sent inclined surfaces of successively less inclination, a container surrounding said plate, anti-freezing liquid therein contacting with one side of said plate, means for distributing petrol over the "other side of said plate, means for supplying air thereto, and battle plates betvveen successive bends adapted to keep the air in close proximity to said plate.

3. In a carbureter the combination of aA flat plate bent into successive curves substantially semi-elliptical and diminishing in vertical depth, a container about said plate, anti-freezing liquid in said container contacting with one side of said plate at every part thereof, means for supplying petrol and air to the other side of saidl plate, and

means for stirrinfr the anti-freezing liquid. In testimony Wliereof We have signed our names to this specification in the presence of two subscribing Witnesses.

NEVILLE SMITH.

KENNETH SMITH. Witnesses:

Il. W. K. JENNINGS, L. E. STAPLES. 

